adds flush to fence_i

src/vm/asmjit/vm_tgc5c.cpp

@@ -2783,7 +2783,7 @@ private:
         cc.comment("//behavior:");
         /*generate behavior*/
         gen_write_mem(jh, traits::FENCE, static_cast<uint32_t>(traits::fencei), imm, 4);
-        auto returnValue = CONT;
+        auto returnValue = FLUSH;
         
         gen_instr_epilogue(jh);
         this->gen_sync(jh, POST_SYNC, 48);